Business days calculator
Holidays 2025-2028Find the date that is N business days from a start date, or count working days between two dates, skipping weekends and public holidays: US federal by default, or the UK, Canada, Australia, India, Germany, France or Singapore.
Fill in the fields to see the result.
How to use it
- Pick 'Date after N business days' or 'Business days between two dates'.
- Choose the start (and end) date and the holiday calendar.
- Read the date or count and the holidays that were skipped.
Details
- US holidays
- The 11 federal holidays (5 U.S.C. 6103) with observed dates
- Counting
- Start date excluded, end date included, as in 'due in 10 business days'
- Range
- Holiday data 2025-2028; outside that only weekends are skipped
- Data
- python-holidays (MIT)
Questions
Is the start date counted?
No. Adding 1 business day to a Monday gives Tuesday. For 'between', the start is excluded and the end included, the usual way deadlines are counted.
What about when a holiday falls on a weekend?
The observed weekday is skipped: a Saturday holiday is observed on Friday and a Sunday one on Monday, as on OPM's federal schedule.
Do banks close on the same days?
Mostly. The Federal Reserve closes on the federal holidays, but when a holiday falls on Saturday it stays open on the Friday, so bank deadlines can differ by a day.
Can I go backwards?
Yes, enter a negative number of days to find a date N business days before.
Is what I type sent anywhere?
No. The calculation runs in this browser tab with the same code our MCP server uses. Nothing you type is sent to a server or saved, apart from settings like filing status, which stay in this browser.
Can an AI agent use this?
Yes. The same function is a tool on our free MCP server at tools.cuelark.com/mcp, so ChatGPT, Claude or Cursor get exactly the answer this page shows. 'Copy MCP call' gives you the arguments.